package first.niuke.simple;

import java.util.Stack;

/**
 * @ClassName NC137
 * @description:
 * @author: 荣燊
 * @create: 2021-04-20 20:21
 **/
public class NC137 {
    public int solve (String s) {
        // write code here
//        Stack<Integer> stack1 = new Stack<>();
        Stack<Character> stack1 = new Stack<>();

        return 0;
    }
}
